Hello,
I actually heard a different opinion from a vehicle inspector regarding the
oil change.
He said (and he works in a very poor neighborhood where he sees a LOT of older
vehicles failing) that changing the oil before the inspection is the worst
thing you
can do.  According to him, when you drain the oil and put fresh in it
"releases" a bunch
of build-up and such that has been clinging to the side walls and such of the
block (?)
and for the next few hundred miles (or so) it burns all this gunk out the
tailpipe causing
a worse reading than if you would have left it alone.  I don't remember his
words exactly,
but I do remember him saying that everyone changes their oil before the
inspection and
that "thats the worst thing you can do."
james